When Touchscreen Mode is enabled (via Controls -> Mouse Settings -> Touchscreen Mode) you can drag the contents of the Crafter's output slot around, which causes some visual strangeness.
MC-269705
Crafter output is draggable in Touchscreen Mode
Open
3
(Unassigned)
1210040
Confirmed
Expansion B
Normal
UI
crafter
1.20.4, 24w12a, 1.21
Retrieved
This issue is not exclusive to the latest snapshot.